Home / 15,347.20-23,020.80-13,986.40

Finding the Fourth Proportional to 15,347.20, 23,020.80 and 13,986.40

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Solution

The fourth proportional to 15,347.20, 23,020.80 and 13,986.40 is: 20,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,347.20 : 23,020.80 = 13,986.40 : x
  2. Step 2: Convert to fraction form
    15,347.20/23,020.80 = 13,986.40/x
  3. Step 3: Cross multiply
    15,347.20x = 23,020.80 × 13,986.40
  4. Step 4: Simplify right side
    15,347.20x = 321,978,117.12
  5. Step 5: Solve for x
    x = 321,978,117.12/15,347.20
  6. Step 6: Final answer
    x = 20,979.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.